Roller mounting for spinning machines



Aug. 2, 1960 R. RULON-MILLER ETAL 2,947,939

ROLLER MOUNTING FOR SPINNING MACHINES 5 Sheets-Sheet 1 Filed Aug. 20,1957 W 'INVENTORS.

r! cabal-f Halon-Mi l/er' Warner H- Taha r ATTORNEYS.

1960 R. RULON-MILLER ETAL 2,947,039

ROLLER MOUNTING FOR SPINNING MACHINES Filed Aug. 20, 1957 5 Sheets-Sheet2 a 51/1 \v in W/MM ///////////b/ /i Q 1W9? F2 6 "f 0 7- .1 er ob 5247/925, 2%. 70/901 AT TORNEYS.

R. RULON-MILLER ET AL 2,947,039

ROLLER MOUNTING FOR SPINNING MACHINES Aug. 2, 1960 5 Sheets-Sheet 4Filed Aug. 20, 1957 m 1 M w a 9 r. I e h o R W a H r e M W BY ATTORNEYS.

Aug. 2, 1960 R. RULONMILLE R ET AL RdLLER MOUNTING FOR SPINNING MACHINES5 Sheets-Sheet 5 Filed Aug. 20, 1957 INVEN} R 0176/2 RZL/O/7-MZ''LO'arner H. Tafior' BY ATTORNEYS.

Robert Rulon-Miller and Warner I-I. Tabor, Bristol, R.I.,

assignors to Dixon Corporation, a corporation of Rhode Island Filed Aug.20, 1957, Ser. No. 679,211

4.Claims. (Cl.19'-1'34) This invention relates to improvements inspinning and roving machines, particularly the drawing mechanismtherefor employing the so-called Roth, Duo-Roth and Casablanca typespinning. V

The top rolls of the usual drawing mechanism of the above type have endtrunnions and are mounted tor rotation in cap bar blocks or bearingswhich are adjustably secured on capbars which in turn are mounted on astationary held back bar. The said top rolls require lubrication at thebearing portions thereof which is a major source of wear and a locationfor dirt to accumulate. The top rolls are adjusted and aligned to thedesired relation by moving the cap bar blocks along the .cap bars. Thisinvolves considerable labor. The lower apron of each .drawing unit istrained over the lower middle roll of the unit and extends therefrom topass over a front guide bar which is common to the lower aprons of aplurality of the drawing units.

' An object of the invention is to provide for supporting the top rollsof the drawing mechanism in a way so as to eliminate the cap bars andcap bar blocks.

Another object of the invention is to provide for supporting the toprolls of a section of a plurality of drawing mechanisms in a way tosimultaneously adjust all the top rolls of said section.

Another object of the invention is to mount the top rolls of a drawingmechanism to eliminate lubrication thereof; 7

Another object of the invention is to provide for individually guidingthe leading end of each lower apron of a drawing mechanism.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described andparticularly pointed out in the appended claims.

In the accompanying drawings:

'Fig. 1 is a fragmentary vertical sectional view taken between rollstands of the drawing mechanism of a construction embodying theinvention;

Fig. 2 is a similar view taken between roll stands at a location throughthe mid point between rolls of a drawing mechanism;

Pig. 3 is a top plan View loo-king in the direction of the arrows online 33 of Fig. l, drawn on a reduced scale and with certain partsomitted for showing the parts beneath;

Fig. 4 is a plan view partially in section of the back saddle oi theunit and the top rolls carriedthereby;

.r 4 2,639 Patented Aug. 2, 1960 2. r in Fig. 7 looking thereat in thedirection of the arrows on line 8-8 of Fig. 2;

Fig. 9 is a longitudinal sectional view of a top roll;

' Fig. 1 0 is a plan View of-a modified construction of back bar andshowing the cleaner roll supports attached thereto;

Fig. 11 is a sectional view taken substantially along line 11-11 of Fig.10; and

Fig. 12 is a sectional view taken substantially along line 1212 of Fig.11.

The drawing mechanism of a spinning frame of the type shown is wellknown in the art, and only so much thereof has been illustrated .anddescribed as is necessary for a clear understanding of the presentinvention.

Referring to Figs. 1 and 2, 10 designates generally a textile'spinningmachine arranged for an operationutilizing a long draft system, as bywayof example, the Casablanca type comprising three pairs of drawingrolls which are arranged to collectively operate on a strand or strandsof sliver. These rolls are respectively top and bottom, front rolls 1-1and 12, middle rolls 13 and 14, and back rolls l5 and 16. There ismounted-and supported on the bottom middle roll 14 a cradle 1'7 whichcarries upper and lower nose pieces 18 and 19. An apron 2b is trainedover the roll 13 and nose piece 18. An apron Z1 is trained over roll 14,nose piece 19 and a weighted cylinder 22 for the purpose of tensioningthe apron 21. The lower rolls 12, 14 and 16 extend the entire length ofthe machine and are rotatably supported in roll stands 23 which aremounted on a roller beam indicated 24. The lower rolls are fluted steelrolls and are driven by suitable mechanism (not shown). The upper or toprolls 11, 13 and 15 merely rest on their respective lower rolls and arerotated by surface contact therewith. Pressure is applied on the toprolls 11, 13 and 15 by a saddle 25 which is made in two parts to behereinafter referred to as the front. saddle 26 and back saddle 27. Astirrup 28 depends from the front saddle with an opening near its lowerend through which extends a lever 29 so as to engage the stirrup as at30. The lever 29 is fulcrumed to an adjustable eye bolt 31 .as at 32 andextends therefrom to be engaged by a weight of looped pull spring 33which exerts a pulling force on the lever 29 in a direction to apply adownward 1y force on the stirrup, which force is transmitted through thesaddles onto the said top rolls.

The top rolls usually comprise a pair of bosses, usually referred to ascots, which are joined by a reduced neck portion against which thesaddle bears. The top rolls of each drawing unit of three rolls comprisethree pairs of cots and in each section there may be two or more unitsextending axially in line between. roll stands. A feature of novelty ofthe present invention is in mounting the top rolls of each unit, on thesaddle of the unit so that the top rolls of each unit may be removedwith the saddle as a unit; and in mounting the saddle on the back bar ofthe machine in a Way wherein all the top rolls of the units between rollstands may be simultaneously adjusted and aligned in proper relation.Ac-

- cordingly, the front top roll 11 (see Fig. 9) comprises Fig. 5 is asectional viewtaken substantially 'alongline 5-5 of Fig. 4;

Fig. 6 is a sectional view taken substantially along line 6-6 of Fig. 3but omitting certain elements appearing along this line in Fig. 3;

Fig. 7 is a plan view looking in the direction of the arrows on line7--7 of Fig. 2 of a lower guide and Weighted cylinder for a lower apronof the drawing mechanism;

Fig. 8 is an end elevaticnal view of the parts shown an anbor on whichare mounted a pair of spaced cots 35 which are made of a non-metallicmaterial, as for example, natural or synthetic rubber, and are pressfitted or otherwise arranged to be fixed to arbor 34 so as to rotatetherewith. The cots extend to the ends of the arbors and the ends of thearbors are provided with axial center conical openings 36 which providecenters for mounting the roll on the usual roll bufiing apparatus. Aball bearing 36 is mounted on the arbor 34 midway between the cots. Theball bearing 36 is of any approvide manufacture having inner and outerraceways 37, 38 respectively. The inner raceway 37 is secured to thearbor 34 as by means of a press fit so as to be rotatable therewith. Theback top roll is similarly'constructed (see Figs. 4 and 5) with theexception that the arbor is journalled in an oiless bearing 39 to behereinafter described.

The arbor of the back top roll is indicated by numeral 34' and the cotsthereon by numeral 35', both arbor and cots being of the same diameteras the arbor 34 and cots 35 of the front roll. The middle top roll 13(see particularly Fig. 4) is steel and has a neck portion of a diametersubstantially equal to the diameter of arbor 34 and provides a pair ofbosses 41 having a knurled surface 42 and each end is reduced as at 43to receive an oiless annular bearing 44. Each boss 41 may be madeseparate and provided with a bore to receive an arbor similar to arbor34. The top roll 13 is likewise provided with a bearing 39' which isidentical to bearing 39.

The front saddle 26 has an upstanding boss 45 (best seen in Fig. 2)which is provided with a screw threaded opening 46 therethrough forreceiving a stirrup adjusting screw 47 having a slotted head 48 andprovided with a reduced neck portion 49. The front end portion of thesaddle has a recess 50 into which projects a resilient button 51 securedto a wall of the recess. The button is semi-spherical, or nearly so, andis made of any suitable material having the necessary resiliency to becompressed and to recover. The ball bearing 36 is inserted into therecess 50 by pushing the same into the recess past the button 51 whichwill be compressed thereby. The button projects into the recess at alocation to be outwardly of the bearing 36 when seated in the recess sothat upon the bearing being pushed past the button at the diameter ofthe bearing, the button will recover to detachably lock the outerraceway of the bearing into frictional engagement with the walls of therecess. The other end portion of saddle 26 is provided with an elongatedslot 52 therethrough, the upper edge of which is surrounded by a ledge53.

The back saddle 27 is provided at the rear end portion thereof with ayoke formed by lugs '54 which depend at opposite sides of the saddle andare provided with aligned slots 55 therethrough. The saddle has a guidegroove 56 at the upper side and an opposite guide groove 57 at the lowerside thereof. Three spaced elongated slots 58, 59, and 60 extend throughthe saddle from the guide groove 56 to the guide groove 57. The bearings39 and 39 are received in the guide groove 57 and are adjustably securedin position by headed screws 61 and 62, respectively.

The bearing 39 (see Fig. 5) comprises a metal block 63 having a bore 64therethrough which is intersected by a lateral recess 65. Bearingsleeves 66 are frictionally,

received in said bore 64 at each side of recess and extend into the boreto be flush with the side walls 67 of recess 65. The arbor 34' isjournalled for rotation in said bearing sleeves 66 and locked againstaxial movement by thrust washers 68 interposed between the said walls 67and a snap ring 69 engaging in a circumferential groove 70 in the arbor34'. The sleeves 66 may be made of any suitable material requiringnon-lubrication, as for example, a Teflon material in which there hasbeen incorporated ground glass particles as described in patentapplication of Robert Rulon-Miller, Ser. No. 306,345,

now abandoned. The upper marginal opposite edge por-.

tion of block 63 is recessed as at 71 which provides a tongue portion 72which slidably engages in the guide groove 57 of back saddle 27. Thus,the relation of the back roll 15. may be adjusted by merely looseningscrew 61 to allow sliding the bearing 39 to the required location andthen retightening the said screw. As previously mentioned, the bearing39 for the middle top roll is identical to bearing 39 and is similarlyadjustably secured 4 V in the guide groove 57 at the proper distancefrom the back roll 15.

As seen in Figs. 1, 2 and 3, the back saddle is supported on a back bar75 which carries brackets 76 which are pinned thereto as at 77 (see Fig.2). There is a back bar 75 for each section of drafting units betweeneach roll stand 23 and each back'bar carries a bracket 76 for eachsaddle of said drafting units. Thus, a section of three draft units willhave three spaced brackets 76; and if the section has more than threedraft units, the back bar will carry a like number of brackets. The lugs54- of the back saddle straddle a bracket 76 with slot 55 and isdetachablyreceiving a pin 78 which projects from either side of thebracket.

A. fulcrum seat '79 (see'Fig. 2) having an arcuate or ball Socket 8% isadjustably secured in guide groove 56 by a screw 81 which extendsthrough slot 59 into screw threaded engagement with the fulcrum seat 79.Thus, the position of the seat 79 may be adjusted along the guide groove56. The front saddle 26 has a semispherical bearing 82 which iscomplemcntal to socket and which is secured in position by a headedscrew 83 extending through slot 52 into screw threaded engagement withsaid bearing 82, the slot allowing for an additional adjustment for thefulcrum between the back and front saddle portions. The bearing 82fulcrums in socket 80 which allows self-alignment of the front top roll11 with the front bottom roll 12.

It will be apparent from the above that the saddles of each section of.drafting units are secured to the brackets 76 by the pins 78 carriedthereby. Since the brackets are in turn fixed to the back bar 75 by pins77, the rotation of the bar in one or the other direction will throughpins 78 adjustably move all the saddles in one section along arectilinear line parallel to the line of travel of the strands over thebottom rolls 12, 14, 16. Thus, rotating the bar 75 counterclockwise, asseen in Fig. 2, will advance the top rolls as a unit toward the front ofthe machine, and rotating the bar in the other or clockwise directionwill move the top rolls as a unit toward the back of the ma chine, thusproviding for simultaneously adjusting the position of the top rolls ofeach drawing action. Accord ingly, the back bar 75 is provided with anaxial bore 84 (see Fig. 6) in the ends thereof in which is received ashort bearing stud 85 having an enlarged generally cylindrical head 86having opposite flat sides 87 (see also Fig.

'1). The stud is detachably held secured to the back bar by set screw88. Each stand 23 has a bearing opening 89 extending axially of therolls at the upper rear portion thereof and has a restricted opening 99(Fig; l) thereto extending inwardly from the upper side of the stand.The opening 90 is made of a size slightly larger than the dimension ofthe head 86 between the flats 87. The back bar 75 is attached at eachend thereof to adjacent stands by passing the heads of the trunnionsfiatwise through opening 90 and then rotating the bar to position theflats 87 generally at right angles to the walls of opening 90. Aresilient generally iJ-clip 91. has thc arms 92 thereof spaced atdistance slightly less than the width of opening 90 so as to allow saidarms to be inserted into said opening to engage against the adjacentfiat 87. A headed clamp screw 93 extends through the bight of the U-clipand into screw threaded engagement with the head 36 (see particularlyFig. 6). Tightening screw 93 will draw the clip toward the fiat 87 andcause the arms 92 to spread into tight engagement with the walls ofopening 90 so as to firmly secure the trunnion to said stands 23. Toadjust the top rolls as above described, the screws 88 are loosened soas to allow the bar to be rotated on bearings 35 and thereafter thescrews may be tightened in a usual way to secure the bar in adjustedposition. It will be obvious the back bar may be readily removed fromthe stands by first removing the clamp clips 91 and thereafter rotatingthe back bar to align thefiats with opening 90 to allow passage of thehead 86 through said opening 90.

The head 94 of screw 93 (see Fig. 1) is provided with an axial screwthreaded opening 95. A bearing stand cover 96 extends over the upperside of stand 23 and has an opening 97 through which a cap screw 98extends to engage in opening 95 to secure the cover 96 in position.Cleaner roll brackets 99 and 100 are mounted on the cover and risetherefrom for bearing engagement by the arbors 101 and 102 of thecleaner rolls 103, 104, respectively.

In some instances, the back bar of each section of drafting units may beconnected one to the other (as shown in Figs. 10, 11 and 12). A coupling105 (see Fig. 11) has a blind bore 106 extending inwardly from one endthereof and a bearing stud 107 projecting from the other end thereof. Acoupling 105 is mounted on each end of a back bar here indicated 75 andsecured thereto by a set screw or screws108. The studs 107 of adjacentbars are received in opening 89 of each stand 23 and are held therein bya block 109 (see Figs. 11, 12) which is snugly received between theparallel sides of opening 90 and extends to overlie the studs 107 oneach stand 23. The block has spaced lips 110 which rest on the studs 107and a clamp screw .111 extends through one end portion of the block 109into screw threaded engagement with the stud 107. A headed screw 112(see Fig. 11) extends through the other end of the block into screwthreaded engagement with the stud of the adjacent coupling 105. Thus,adjacent back bars 75' are connected to each other and to a stand 23.The cover 96 is positioned to rest on block 109 beneath the head ofscrew 112 and ,alock washer113 and .is thereby held in position on thestand 23. It will be seen that tightening screws 111 and 112 will drawthe block 109 into engagement with the studs associated therewith andcause the lips 110 to spread outwardly into firm engagement with thesides 90 of opening89. Each bar 75' carries a bracket 76 for eachdrafting unit of each section, as previously mentioned. The back bars75' may be rotated in the couplings 105 by loosening screws 108 wherebyto turn the back bar to adjust all the top rolls of the drafting unitsof the sections as previously pointed out in the description of the backbar 75 of Figs. 1, 2 and 3.

Another feature of novelty of the present invention is inthe arrangementof guiding each individual apron 21 by the nose piece 19 which iscarried by each separate cradle 17. This provides for a space betweencradles adjacent to the front rolls of each unit through which a directpassageway is had from the stirrup adjusting screw 47 to the lever 29,as shown in Fig. 2. The stirrup 28 is detachably held in the neckportion 49 of the stirrup screw head 48 and extends'therefrom in adirectline without any bends therein'to engage the lever 29.

In the present disclosure, the apron 21 extends a substantial distancebeneath the bottom rolls of the drawing unit and the weighted cylinder22 is mounted on a bracket less than the spacing between said arms so asto allow a slight axial movement of the bracket. It may be herementioned that the cradles are free to be axially moved along the lowerroll 14 and are blocked against but a slight axial movement by the toproll 13 which from a manufacturing standpoint is of advantage in that noboss on the bottom roll needs to be provided for such holding and thusthe expense of the provision of such boss is eliminated. The top roll 13which is engaged is not changed from the form usually used.

From the foregoing description, it will be apparent that all the toprolls of each drafting unit are free of end trunnions and are mounted inoiless bearings at the mid portion thereof. Thus, there is eliminatedall the usual cap bars, cap bar bearings, and supporting structure.Moreover, it will be apparent that in mounting the top rolls on thesaddle, all top rolls may be moved in unison for such adjustment whichis required for setting up the spinning machine. It will also beapparent among other features of novelty that all the top draftingmembers of a section may be removed bodily with the saddles and toprolls of each drafting unit may be removed bodily with the saddles.Further, each pair of top rolls of the drafting units are fixed to anarbor and thus turn in unison. That is, a pair of cots 11 turn together,a pair of cots 13 turn together, and a pair of cots 15 turn together,causing two adjacent strands to have uniformity which is different fromthat heretofore known to have been done.

We claim:

1. In a drawing mechanism for spinning and roving machines, a roll standhaving a bearing with an opening thereto of a dimension less than thediameter of said bearing, a member having a portion to fit said bearing,said portion being slabbed ofi to provide a dimension in one directionto pass through said opening into said bearing, a back bar, means torotatably mount said back bar on said member, a plurality of spacedsaddles extending in generally parallel arrangement at right angles tosaid back bar, spaced arms one for each of said saddles fixed tosaidbar, and means rockably connecting a saddle to its corresponding armso that upon rotating said bar a plurality of saddles will besimultaneously adjusted in th 114 which is mounted for free swinging ona rod 115 v carried by a lug 23 (Figs. 1 and 2) depending from thedirection of their extent.

2. In a drawing mechanism as in claim 1 wherein there are means to lockthe bar to said member in adjusted position.

3. In a drawing mechanism as in claim 1 wherein said rockable meanscomprises a slot and pin connection.

4. In a drawing mechanism as in claim 1 wherein said stand has aplurality of top rolls, a top roll being rotatably mounted at its midportion by each of said saddles, whereby adjustment of said saddles alsoadjusts said top rolls.

France Ian. 26, 1942

